"""
* | File        :	  epd7in5.py
* | Author      :   Waveshare team
* | Function    :   Electronic paper driver
* | Info        :
*----------------
* | This version:   V4.0
* | Date        :   2019-06-20
# | Info        :   python demo
-----------------------------------------------------------------------------
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documnetation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to  whom the Software is
furished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS OR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
"""


import logging
from . import epdconfig

# Display resolution
EPD_WIDTH = 880
EPD_HEIGHT = 528


class EPD:
    def __init__(self):
        self.reset_pin = epdconfig.RST_PIN
        self.dc_pin = epdconfig.DC_PIN
        self.busy_pin = epdconfig.BUSY_PIN
        self.cs_pin = epdconfig.CS_PIN
        self.width = EPD_WIDTH
        self.height = EPD_HEIGHT

    # Hardware reset
    def reset(self):
        epdconfig.digital_write(self.reset_pin, 1)
        epdconfig.delay_ms(200)
        epdconfig.digital_write(self.reset_pin, 0)
        epdconfig.delay_ms(2)
        epdconfig.digital_write(self.reset_pin, 1)
        epdconfig.delay_ms(200)

    def send_command(self, command):
        epdconfig.digital_write(self.dc_pin, 0)
        epdconfig.digital_write(self.cs_pin, 0)
        epdconfig.spi_writebyte([command])
        epdconfig.digital_write(self.cs_pin, 1)

    def send_data(self, data):
        epdconfig.digital_write(self.dc_pin, 1)
        epdconfig.digital_write(self.cs_pin, 0)
        epdconfig.spi_writebyte([data])
        epdconfig.digital_write(self.cs_pin, 1)

    def ReadBusy(self):
        logging.debug("e-Paper busy")
        busy = epdconfig.digital_read(self.busy_pin)
        while (busy == 1):
            busy = epdconfig.digital_read(self.busy_pin)
        epdconfig.delay_ms(200)

    def init(self):
        if (epdconfig.module_init() != 0):
            return -1
        # EPD hardware init start
        self.reset()

        self.ReadBusy()
        self.send_command(0x12)  # SWRESET
        self.ReadBusy()

        self.send_command(0x46)  # Auto Write Red RAM
        self.send_data(0xf7)
        self.ReadBusy()
        self.send_command(0x47)  # Auto Write  B/W RAM
        self.send_data(0xf7)
        self.ReadBusy()

        self.send_command(0x0C)  # Soft start setting
        self.send_data(0xAE)
        self.send_data(0xC7)
        self.send_data(0xC3)
        self.send_data(0xC0)
        self.send_data(0x40)

        self.send_command(0x01)  # Set MUX as 527
        self.send_data(0xAF)
        self.send_data(0x02)
        self.send_data(0x01)  # 0x01

        self.send_command(0x11)  # Data entry mode      
        self.send_data(0x01)

        self.send_command(0x44)
        self.send_data(0x00)  # RAM x address start at 0
        self.send_data(0x00)
        self.send_data(0x6F)
        self.send_data(0x03)
        self.send_command(0x45)
        self.send_data(0xAF)
        self.send_data(0x02)
        self.send_data(0x00)
        self.send_data(0x00)

        self.send_command(0x3C)  # VBD
        self.send_data(0x05)  # LUT1, for white

        self.send_command(0x18)
        self.send_data(0X80)

        self.send_command(0x22)
        self.send_data(0XB1)  # Load Temperature and waveform setting.
        self.send_command(0x20)
        self.ReadBusy()

        self.send_command(0x4E)  # set RAM x address count to 0
        self.send_data(0x00)
        self.send_data(0x00)
        self.send_command(0x4F)
        self.send_data(0x00)
        self.send_data(0x00)
        # EPD hardware init end
        return 0

    def getbuffer(self, image):
        # logging.debug("bufsiz = ",int(self.width/8) * self.height)
        buf = [0xFF] * (int(self.width / 8) * self.height)
        image_monocolor = image.convert('1')
        imwidth, imheight = image_monocolor.size
        pixels = image_monocolor.load()
        # logging.debug("imwidth = %d, imheight = %d",imwidth,imheight)
        if (imwidth == self.width and imheight == self.height):
            logging.debug("Vertical")
            for y in range(imheight):
                for x in range(imwidth):
                    # Set the bits for the column of pixels at the current position.
                    if pixels[x, y] == 0:
                        buf[int((x + y * self.width) / 8)] &= ~(0x80 >> (x % 8))
        elif (imwidth == self.height and imheight == self.width):
            logging.debug("Horizontal")
            for y in range(imheight):
                for x in range(imwidth):
                    newx = y
                    newy = self.height - x - 1
                    if pixels[x, y] == 0:
                        buf[int((newx + newy * self.width) / 8)] &= ~(0x80 >> (y % 8))
        return buf

    def display(self, image):
        self.send_command(0x4F)
        self.send_data(0x00)
        self.send_data(0x00)
        self.send_command(0x24)
        for i in range(0, int(self.width * self.height / 8)):
            self.send_data(image[i])

        self.send_command(0x22)
        self.send_data(0xF7)  # Load LUT from MCU(0x32)
        self.send_command(0x20)
        epdconfig.delay_ms(10)
        self.ReadBusy()

    def Clear(self):
        self.send_command(0x4F)
        self.send_data(0x00)
        self.send_data(0x00)
        self.send_command(0x24)
        for i in range(0, int(self.width * self.height / 8)):
            self.send_data(0xff)

        self.send_command(0x26)
        for i in range(0, int(self.width * self.height / 8)):
            self.send_data(0xff)

        self.send_command(0x22)
        self.send_data(0xF7)  # Load LUT from MCU(0x32)
        self.send_command(0x20)
        epdconfig.delay_ms(10)
        self.ReadBusy()

    def sleep(self):
        self.send_command(0x10)
        self.send_data(0x01)

        epdconfig.module_exit()
### END OF FILE ###
